miles-ton opened a new issue, #7539: URL: https://github.com/apache/rocketmq/issues/7539
### Before Creating the Bug Report - [X] I found a bug, not just asking a question, which should be created in [GitHub Discussions](https://github.com/apache/rocketmq/discussions). - [X] I have searched the [GitHub Issues](https://github.com/apache/rocketmq/issues) and [GitHub Discussions](https://github.com/apache/rocketmq/discussions) of this repository and believe that this is not a duplicate. - [X] I have confirmed that this bug belongs to the current repository, not other repositories of RocketMQ. ### Runtime platform environment windows11，idea 2023.2.4 ### RocketMQ version commit id：46962c262c37554ff09afe9e02c7baf66a5ecc73 ### JDK Version jdk8，java-se-8u43-ri ### Describe the Bug when i running broker, and send message to broker, the message have beed sent to broker successfully, but after a while i occasionally found my disk has been fill up (the index file occupy my 200G disk). i try to find what happen. then i've found follow exception in class : IndexService.getAndCreateLastIndexFile when we send message to broker, broker will create index file, the steps for index file creation as follows: - try to find last index file throught `indexFileList` - if `indexFileList` is empty then create a `IndexFile` - `IndexFile` constructor contain a `DefaultMappedFile` - `DefaultMappedFile` will create a `RandomAccessFile` - follow statement are the root problem `this.fileChannel = new RandomAccessFile(this.file, "rw").getChannel(); this.mappedByteBuffer = this.fileChannel.map(MapMode.READ_WRITE, 0, fileSize);` after RandomAccessFile has been created, then will channel map to allocate disk space and mmap to memory, but the problem is allocate disk space and mmap is not atomiclly, so if disk space has been allocated successfully, but mmap failed, then a exception will be throw, this exception will cause a useless 400M IndexFile created in disk and can't be used, and there's something worse, every index log exception will cause a useless 400M IndexFile. may be we can delete that created IndexFile after a exception if the IndexFile has been allocate disk space ### Steps to Reproduce create a IndexFile and allocate disk space successfully but mmap failed, like OutOfMemory    ### What Did You Expect to See? delete the useless IndexFile if the file has been allocate disk space after a exception occur ### What Did You See Instead? many useless IndexFile occupied my 200G disk space ### Additional Context _No response_ -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
